stepping machanism of Apple Disk ][ drive (was Re: Heatkit 5 1/4 floppies)

From: allisonp_at_world.std.com <(allisonp_at_world.std.com)>
Date: Thu Apr 8 07:28:22 1999

> you've ever written FDC code, you know what it sounds like when you try to
> go beyond the limit. What's more, there's a sensor to tell you when you're
> at that point, though I doubt Apple used it. It's just as easy to move the

Actually there are two points. One is track 000 and the other is the
innermost (for sa400 35-40 tracks later). Only track 000 was sensored
save for apple didn't use that either. Apple cut the interface to the
minimim number of wires and signals possible and made up the difference
with software, rather clever in my mind.

Allison
Received on Thu Apr 08 1999 - 07:28:22 BST